Improvement in steam-generators



THOMAS W. H. MOSELEY.'

lmprovementin Steam-Generators. No 114 7029 Pawnedmays,1871.

UNITED STATES kPATENT QFFICE.

THOMAS WV. H. MOSELEY, OF HYDE PARK, MASSACHUSETTS.

IMPROVEMENT IN STEAM-GENERATORS.

I, THOMAS W. H. MOSELEY, of Hyde Park,

in the county of Norfolk and State of Massachusetts, have invented a new and Improved Steam-Generator or Tater-Heater, of which the following is a specification:

' Nature and 'Objects of the Intention.

My generator or heater is constructed with a central flue passing vertically up through its entire height, and surrounded by an annular watermain, from which project radial hol low arms or branches, connecting at their inner ends with the annular water-space, and arranged around the center in a peculiar Inanner, hereinafter described, so as to cause the deflection of the products of combustion which Description of the Accompanying Drawing.

Figure l represents a vertical axial section of the entire generatorand furnace. Fig. 2 is a plan or top view of one-half of the same. Fig. 3 is a vertical section, on a larger scale, of the upper end of the water-main and center flue with their connections. Fig. et is a similar section of the lower end ot' the same.

General Description.

My steam-generator or heater is constructed as follows: I first take a large gas or other wrought-iron pipe to constitute avertical trunk or main, A. This pipe is made of a length to correspond with the desired capacity of the generator. For a medium sized generator, (one of sixteen-horse power, for illustration,) I employ a main three inches in diameter and six feet long. These relative proportions may be varied where, from economic or other reasons, a generator of larger or smaller capacity is required without a corresponding increase or diminution in length.

AThe ends of the main A are tted in V- `shaped annular grooves in cast-iron caps B C,

by which the ends are closed.

In the center of the caps B C holes are tapped to receive the threaded ends of an interior pipe, D, whichis of 'one-half the diameter of tha main pipe A, and is thus fitted concentrically within the latter.

The upper end ofthe inner pipe passes through the. top or upper cap, I3, and a nut driven down its threads and pressing down on the said cap forces the ends of the pipe into the V-grooves, and thus produces tight joints.

The interior of the inner pipe, D, constitutes a fire-flue, and the interior of the main pipe, A, around the inner pipe, D, constitutes the main distributing water-space. The water in `said space is thus exposed to heatingsurfaces .will correspond with that of the annular space between the central ue and theinain.

The branches are so disposed in the successive courses that one of them will not come directlyover another until the seventh course is reached, in which the branches may correspend in `their circumferential position with those in the seventh rank below.

The lower sidesof the branches are thus exposed in the most uniform and efficient :manner to the action ot` the heated products of combustion, which rise within the-furnace and circulate freely among all the branches.

In order to provide for the free circulation ofwater, and to conduct steam as fast as-it is evolved to the steam-drum at top of the generator, I apply at the outer ends of all the horizontal branches coupling-heads F, with horizontal threaded holes to receive the ends of said branch pipes, and as all the branch pipes are made of exactly equal length, all the coupling-heads will be accurately at the same distance radially from the center of the main.

On the top and bottom of the couplingheadsF are V-shaped grooves, extending concentrically around the vertical bore thereof, to receive the ends of vertical circulationpipes G, which forni a connection from top to bottom between the ends of all the pipes which are in one vertical line. rIhe joints at the end of these pipes, and all similar joints in the structure, are formed with ber gaskets or luting saturated with white or red lead ground in oil.

The upper ends of the vertical circulationpipes G are in like manner fitted and jointed in annular V-shaped grooves surrounding apcrtures'in the under side of the upper steamdruin H.

Iods I, which may be in diameter equal to slightly more than one-half the internal diameter ofthe upright pipes G, pass through the said pipes and through the steam-drum H from bottom to top. Heavy screw-threads are cut on both ends of the said rods, so that by driving up with a wrench the ends of the pipes are forced firmly into their grooves, and secure joints are thus produced. This mode of construction will be seen to provide for the ready removal of any of the pipes for repairs or other purposes by simply unscrewing the nuts from the top of the steam-drum, and taking out any upright or branch tube that may be defective.

The construction and the repair of this generator are greatly simplied and cheapened by making all the branch pipes for any given size and style of generators precise counterparts of each other, and so with the vertical circulation-pipes G.

The upright or circulation pipes are intended to be as close together as practica-ble, and, consequently, the length of the branch pipes is made only sufficient to produce this result; so, then, if the main A is less, so are the internal fire-flue D, the branches E, and the uprights G, giving the outside diameter its proper relative proportion.

The steam-drum I-I may be of heavy castiron. It forms a horizontal hollow ring ot' quite large size, having a capacity equal to that of all the uprights combined. It forms a way of communication between all the uprights and the upper end of the annular waterspace in the central main, A, and, as its name implies, receives the steam as fast as it is evolved yfrom the water circulating through all the pipes.

The steam is taken out through abranch or neck, J, to which a steam-pipe may bc coupled, in the customary manner.

The feed-Water is introduced through any one or more of the branch pipes, as at El, in the lower part of the generator, immediately above the re, and entering here it is rapidly heated, and though it may enter cold it does not interfere with or check the evolution of steam in the upper part of the generator.

E2 represents a branch pipe employed as a blow-off77 for the removal of sediment.

K isV a yoke or bail secured to the upper capplate, B, of the central main, A, for suspending the entire structure within the furnace by a hanger, L, which may be attached to any suitable machinery for elevating it out ofthe furnace when necessary.

The furnace may be of any suitable construction. That which I prefer to use will be made the subject of a separate application for Letters Patent.

It is intended that the ame and heated products of combustion shall completely surround and envelop all the pipes of the generator.

My boiler is equally well adapted, without material change in construction, for heating water, for warmin g buildings, or for other purposes.

Claims.

I claim as my invention- 1. The combination of the central main, A, radial branches E, vertical circulation-pipes G, couplings F, and the rods I, arranged substantially as and for the purposes set forth.

2. The centra] water-main, A, and flue-pipe D within the same, constructed and connected as described.

3. The annular steam-drum H, in combina tion with thc distribution-pipes G and radial branches E, as explained.

4. The suspension devices K L, or their equivalents, in combination with a heater or generator, constructed substantially as herein described, for the purposes set forth.

THOS. W. H. MOSELEY.

Witnesses:

O c'rAvrUs KNIGHT, WM. H. BRERETON, Jr. 

